1966a. Taxonomic notes on some Mexican and Central American hylid frogs. Univ. Kansas Publ., Mus. Nat. Hist., 17:263-279. June 17. 1966b. The Central American herpetofauna: An ecological perspective. Copeia, 4:700-719. December 23. 1967. Social organization in the mating calls of some Neotropical Anurans. Amer. Midl. Nat., 77(1):156-163. January. DUELLMAN, W. E., and L. TRUEB 1966. Neotropical hylid frogs, Genus Smilisca. Univ. Kansas Publ., Mus. Nat. Hist., 17:281-375, pls. 1-12. July 14. DUNN, E. R. 1931a. The amphibians of Barro Colorado Island. Occas. Papers Boston Soc. Nat. Hist., 5:403-421. October 10. 1931b. The herpetological fauna of the Americas. Copeia, 3:106-119. October 30. 1933. A new Hyla from Panamá Canal Zone. Occas. Papers Boston Soc. Nat. Hist., 8:61-64. June 7. DUNN, E. R., and J. EMLEN 1932. Reptiles and amphibians from Honduras. Proc. Acad. Nat. Sci. Philadelphia, 84:24-25. March 22. FOUQUETTE, M. J. 1958. A new tree frog, Genus _Hyla_, from the Canal Zone. Herpetologica, 14:125-128. April 25. GAIGE, H. T. 1936. Some reptiles and amphibians from Yucatan and Campeche, México. Carnegie Inst. Washington Publ., 457:289-304. GOSNER, K. L. 1960. A simplified table for staging anuran embryos and larvae with notes on identification. Herpetologica, 16:183-190. June 17. GÜNTHER, A. C. L. 1859. Catalogue of the Batrachia Salientia in the British Museum. pp. 1-160. 1885-1902. Biologia Centrali Americana. Reptilia and Batrachia. London, xx + 326 pp., pls. 1-76. KELLOGG, R. 1932. Mexican tailless amphibians in the United States National Museum, Bull. U.S. Natl. Mus., 160:1-224. LAURENTI, J. N. 1768. Specimen medicum exhibens synopsin reptilium emendatum cum experimentis circa venema et antidota reptilium austriacorum. Vienna, pp. 1-216. LINNAEUS, C. 1758. Systema naturae. Holmiae, ed. 10 reformata, I:1-532. MALDONADO-KOERDELL, M. 1964. Geohistory and paleography of Middle America. In R. Wauchope and R. C. West (Eds.). Handbook of Middle American Indians, Vol. I, Univ. Texas Press, Austin, 570 pp. NIEDEN, F. 1923. Amphibia:Anura I. Das Tierreich. Berlin, 584 pp. NOBLE, G. K. 1918. The amphibians collected by the American Museum expedition to Nicaragua in 1916. Bull. Amer. Mus. Nat. Hist., 38:311-347. RAND, A. S. 1957. Notes on amphibians and reptiles from El Salvador. Fieldiana, Zool., Chicago Nat. Hist. Mus., 43:505-534. April 18. RIVERO, J. A. 1961. Salientia of Venezuela. Bull. Mus. Comp. Zool., 126:1-207. November. SAVAGE, J. M. 1966. The origins and history of the Central American herpetofauna. Copeia, 4:719-756. December 23. SCHMIDT, K. P., and L. C. STUART 1941. The herpetological fauna of the Salamá Basin, Baja Verapaz, Guatemala. Field Mus. Nat. Hist., Zool. Ser., 24:233-247. SEBA, A. 1734. Locupletissimi rerum naturalium thesauri accurata descriptio, et iconibus artificissimis expressio, per universam physis historiam. Amsterdam, I xxxiv + 178 pp., pls. 1-111. SIMPSON, G. G.